Rebuild a good firmware existing router firmware but add a config MIPS_FPU_EMULATOR=yes patch/config/setting

Ciao!

How are you?

I got a firmware, which is awesome, works ok D-Link DIR 860l B1:
http://downloads.lede-project.org/releases/17.01.2/targets/ramips/mt7621/lede-17.01.2-ramips-mt7621-dir-860l-b1-squashfs-factory.bin

But, I need NodeJs and it needs MIPS_FPU_EMULATOR=yes and the firmware is turned off with that.

How can I get these settings from the stable branch D-Link DIR 860l B1 17.02.2 that are already there; settings, like the LED, USB, WIFI settings and so on so that I can build the exact firmware, but set MIPS_FPU_EMULATOR=yes and keep all those packages built-in in the 17.01.2?

I just how no idea what packages and settings I have to do to get for my router DLINK 860l B1.

I built a new NodeJs 8.2.1, but it is because the FPU is missing /sys/kernel/debug/mips/fpuemustats is missing. That would make it.

There must be a setting since the BuildBot does it for all the routers including D-Link DIR 860l B1.

Please help!

Thanks,
Patrik